Smoker

Smoker by Rucka, Greg. mass_market edition. ISBN: 9780553578294.

There is only one way to keep a witness from testifying.... It was supposed to be an easy job: baby-sit a pampered playboy hiding from the angry brothers of an ex-playmate. But someone had forgotten to tell professional bodyguard Atticus Kodiak a few relevant facts. Now Kodiaks been drawn into the crossfire of a multimillion-dollar game of cat and mouse, guarding a potential victim with an explosive story to tell, and pitted against one of the ten most dangerous assassins in the world. One man is a protector. The other is a destroyer. They have one thing in common. Neither will back down. Each will raise the stakes in a deadly duel of wits and skill where the first player to flinch...dies.